Fix GitHub action workflow

Author: Alexander Smirnov

.github/workflows/aws-lambda-java-runtime-interface-client.yml

@@ -63,6 +63,7 @@ jobs:
         path: ./aws-lambda-java-runtime-interface-client/target/aws-lambda-java-runtime-interface-client-*.jar
 
   publish:
+    runs-on: ubuntu-latest
     needs: build
     if: github.ref == 'refs/heads/main'